cw_web/src/views/preview/index.vue

<template>
  <div
    ref="containerRef"
    class="video-container"
    :class="{ 'is-fullscreen': isFullscreen }"
  >
    <!-- Left sidebar control panel -->
    <div v-if="showChannelSelector || ptzEnabled" class="control-sidebar">
      <div class="control-panel" :class="{ 'is-collapsed': ptzCollapsed }">
        <!-- Channel selector -->
        <div v-if="showChannelSelector" class="channel-selector">
          <div class="control-label">Channel</div>
          <el-select
            v-model="selectedChn"
            size="small"
            @change="handleChnChange"
          >
            <el-option
              v-for="ch in channelOptions"
              :key="ch.value"
              :label="ch.label"
              :value="ch.value"
            />
          </el-select>
        </div>

        <!-- PTZ control -->
        <template v-if="ptzEnabled">
          <div v-if="showChannelSelector" class="control-divider" />
          <div class="control-label">PTZ Control</div>
          <div class="ptz-grid">
            <div class="ptz-placeholder" />
            <button
              class="ptz-btn"
              title="Up"
              @mousedown="handlePtzStart(PTZDirection.Up)"
              @mouseup="handlePtzStop"
            >
              <svg viewBox="0 0 24 24" width="22" height="22">
                <path fill="currentColor" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"/>
              </svg>
            </button>
            <div class="ptz-placeholder" />

            <button
              class="ptz-btn"
              title="Left"
              @mousedown="handlePtzStart(PTZDirection.Left)"
              @mouseup="handlePtzStop"
            >
              <svg viewBox="0 0 24 24" width="22" height="22">
                <path fill="currentColor" d="M15.41 7.41L14 6l-6 6 6 6 1.41-1.41L10.83 12z"/>
              </svg>
            </button>
            <button
              class="ptz-btn ptz-btn-center"
              title="Reset"
              @click="handlePtzCenter"
            >
              <svg viewBox="0 0 24 24" width="22" height="22">
                <path fill="currentColor" d="M12 6v3l4-4-4-4v3c-4.42 0-8 3.58-8 8 0 1.57.46 3.03 1.24 4.26L6.7 14.8A5.87 5.87 0 0 1 6 12c0-3.31 2.69-6 6-6zm6.76 1.74L17.3 9.2c.44.84.7 1.79.7 2.8 0 3.31-2.69 6-6 6v-3l-4 4 4 4v-3c4.42 0 8-3.58 8-8 0-1.57-.46-3.03-1.24-4.26z"/>
              </svg>
            </button>
            <button
              class="ptz-btn"
              title="Right"
              @mousedown="handlePtzStart(PTZDirection.Right)"
              @mouseup="handlePtzStop"
            >
              <svg viewBox="0 0 24 24" width="22" height="22">
                <path fill="currentColor" d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/>
              </svg>
            </button>

            <div class="ptz-placeholder" />
            <button
              class="ptz-btn"
              title="Down"
              @mousedown="handlePtzStart(PTZDirection.Down)"
              @mouseup="handlePtzStop"
            >
              <svg viewBox="0 0 24 24" width="22" height="22">
                <path fill="currentColor" d="M7.41 8.59L12 13.17l4.59-4.58L18 10l-6 6-6-6z"/>
              </svg>
            </button>
            <div class="ptz-placeholder" />
          </div>
        </template>
      </div>
      <!-- Collapse toggle -->
      <button class="panel-toggle" :title="ptzCollapsed ? 'Expand' : 'Collapse'" @click="ptzCollapsed = !ptzCollapsed">
        <svg viewBox="0 0 24 24" width="16" height="16">
          <path fill="currentColor" :d="ptzCollapsed ? 'M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z' : 'M15.41 7.41L14 6l-6 6 6 6 1.41-1.41L10.83 12z'"/>
        </svg>
      </button>
    </div>

    <!-- 视频区域（右侧） -->
    <div class="video-wrapper">
      <MyVideo
        ref="videoRef"
        :drag-flag="true"
        @video-error="handleVideoError"
      />
      <button
        class="fullscreen-btn"
        :title="isFullscreen ? 'Exit Fullscreen (F)' : 'Fullscreen (F)'"
        @click="toggleFullscreen"
      >
        <svg
          v-if="!isFullscreen"
          viewBox="0 0 24 24"
          width="16"
          height="16"
        >
          <path fill="currentColor" d="M7 14H5v5h5v-2H7v-3zm-2-4h2V7h3V5H5v5zm12 7h-3v2h5v-5h-2v3zM14 5v2h3v3h2V5h-5z"/>
        </svg>
        <svg
          v-else
          viewBox="0 0 24 24"
          width="16"
          height="16"
        >
          <path fill="currentColor" d="M5 16h3v3h2v-5H5v2zm3-8H5v2h5V5H8v3zm6 11h2v-3h3v-2h-5v5zm2-11V5h-2v5h5V8h-3z"/>
        </svg>
      </button>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted, onUnmounted } from 'vue'
import { ElMessage } from 'element-plus'
import MyVideo from '@/components/myVideo.vue'
import { ptzControl, PTZDirection, getDeviceNum, putDeviceNum } from '@/api/ptz'

const videoRef = ref()
const isFullscreen = ref(false)
const containerRef = ref<HTMLElement>()

const ptzSpeed = ref(4)
const isPtzMoving = ref(false)
const ptzCollapsed = ref(false)

// Device state
const showChannelSelector = ref(false)
const selectedChn = ref(0) // 0: Fixed, 1: PTZ
const ptzEnabled = ref(false)
const channelOptions = [
  { label: 'Fixed Camera', value: 0 },
  { label: 'PTZ Camera', value: 1 }
]

// Fetch device info
const fetchDeviceInfo = async () => {
  try {
    const res = await getDeviceNum()
    // const res = {"data":{"LensNumber":2,"ChnNumber":0}}
    const lensNumber = res?.data?.LensNumber ?? 1
    const chnNumber = res?.data?.ChnNumber ?? 0

    // Dual lens: show channel selector
    showChannelSelector.value = lensNumber >= 2

    // Sync current selection and PTZ state
    selectedChn.value = chnNumber
    ptzEnabled.value = chnNumber === 1
  } catch (error) {
    console.error('Failed to get device info:', error)
  }
}

// User switches between Fixed / PTZ camera via dropdown
const handleChnChange = async (val: number) => {
  try {
    await putDeviceNum({ ChnNumber: val })
    // Re-fetch to get confirmed state from device
    await fetchDeviceInfo()
    // Refresh video stream after switch
    if (videoRef.value?.refreshWebSocket) {
      videoRef.value.refreshWebSocket()
    }
  } catch (error) {
    console.error('Failed to switch channel:', error)
    ElMessage.error('Failed to switch channel, please try again')
    // Revert selection on failure
    await fetchDeviceInfo()
  }
}

const toggleFullscreen = () => {
  if (!containerRef.value) return
  if (!isFullscreen.value) {
    if (containerRef.value.requestFullscreen) {
      containerRef.value.requestFullscreen()
    }
  } else {
    if (document.exitFullscreen) {
      document.exitFullscreen()
    }
  }
}

const handleFullscreenChange = () => {
  isFullscreen.value = !!document.fullscreenElement
}

const handleKeydown = (event: KeyboardEvent) => {
  switch (event.code) {
    case 'KeyF':
    case 'F11':
      event.preventDefault()
      toggleFullscreen()
      break
    case 'Escape':
      if (isFullscreen.value) {
        toggleFullscreen()
      }
      break
  }
}

const handlePtzStart = async (direction: number) => {
  if (isPtzMoving.value) return
  isPtzMoving.value = true
  try {
    await ptzControl({ PtzCmd: direction })
  } catch (error) {
    console.error('PTZ control failed:', error)
  }
}

const handlePtzStop = async () => {
  if (!isPtzMoving.value) return
  isPtzMoving.value = false
  try {
    await ptzControl({ PtzCmd: PTZDirection.Stop })
  } catch (error) {
    console.error('PTZ stop failed:', error)
  }
}

const handlePtzCenter = async () => {
  try {
    await ptzControl({ PtzCmd: PTZDirection.Center })
  } catch (error) {
    console.error('PTZ Center failed:', error)
  }
}

const handleVideoError = (error: any) => {
  console.error('Video playback error:', error)
}

onMounted(() => {
  document.addEventListener('fullscreenchange', handleFullscreenChange)
  document.addEventListener('keydown', handleKeydown)
  fetchDeviceInfo()
})

onUnmounted(() => {
  document.removeEventListener('fullscreenchange', handleFullscreenChange)
  document.removeEventListener('keydown', handleKeydown)
})
</script>

<style lang="scss" scoped>
.video-container {
  width: 100%;
  height: calc(100vh - 90px);
  display: flex;
  margin-top: 20px;
  justify-content: center;
  align-items: center;
  gap: 16px;
  padding: 0 16px;
  position: relative;
  overflow: hidden;

  &.is-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    width: 100vw;
    height: 100vh;
    margin-top: 0;
    padding: 0;
  }
}

.video-wrapper {
  position: relative;
  width: calc(100vw - 208px);
  height: calc((100vw - 208px) / 16 * 9);
  max-height: calc(100vh - 110px);
  max-width: calc((100vh - 110px) / 9 * 16);
  flex-shrink: 0;

  :deep(.preview-container) {
    width: 100%;
    height: 100%;
  }

  .video-container.is-fullscreen & {
    width: 100vw;
    height: 100vh;
    max-width: none;
    max-height: none;
  }

  :deep(.video_container) {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 5px;
    overflow: hidden;

    .video-container.is-fullscreen & {
      border-radius: 0;
    }
  }

  :deep(#player) {
    width: 100%;
    height: 100%;
    object-fit: contain;
  }

  :deep(.video-control) {
    opacity: 0;
    transition: opacity 0.3s ease;
    &:hover { opacity: 1; }
  }

  &:hover :deep(.video-control) {
    opacity: 1;
  }
}

.fullscreen-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  background: rgba(0, 0, 0, 0.6);
  border: none;
  border-radius: 8px;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
  z-index: 10;

  &:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.05);
  }
  &:active { transform: scale(0.95); }
  .video-wrapper:hover & { opacity: 1; }

  .video-container.is-fullscreen & {
    top: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
  }
}

/* Control sidebar */
.control-sidebar {
  flex-shrink: 0;
  display: flex;
  align-items: center;

  .video-container.is-fullscreen & {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
  }
}

.control-panel {
  width: 140px;
  background: #f5f7fa;
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
  transition: width 0.3s ease, padding 0.3s ease, opacity 0.3s ease;

  &.is-collapsed {
    width: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
  }

  .video-container.is-fullscreen & {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(12px);

    .control-label { color: #fff; }
    .control-divider { border-color: rgba(255, 255, 255, 0.15); }

    .ptz-btn {
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      border-color: rgba(255, 255, 255, 0.15);
      &:hover { background: rgba(255, 255, 255, 0.2); border-color: rgba(255, 255, 255, 0.3); }
      &:active { background: rgba(255, 255, 255, 0.3); }
    }
    .ptz-btn-center {
      background: rgba(64, 158, 255, 0.3) !important;
      border-color: rgba(64, 158, 255, 0.5) !important;
      &:hover { background: rgba(64, 158, 255, 0.5) !important; }
    }

    :deep(.el-input__wrapper) {
      background: rgba(255, 255, 255, 0.1);
      box-shadow: none;
    }
    :deep(.el-input__inner) { color: #fff; }
    :deep(.el-select__caret) { color: #fff; }
  }
}

.control-label {
  font-size: 12px;
  font-weight: 600;
  color: #909399;
  white-space: nowrap;
}

.control-divider {
  border: none;
  border-top: 1px solid #e4e7ed;
  margin: 2px 0;
}

.channel-selector {
  display: flex;
  flex-direction: column;
  gap: 6px;

  :deep(.el-select) {
    width: 100%;
  }
}

.panel-toggle {
  width: 24px;
  height: 48px;
  border: 1px solid #e4e7ed;
  border-radius: 0 8px 8px 0;
  background: #f5f7fa;
  color: #909399;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s ease;
  padding: 0;
  margin-left: -1px;

  &:hover {
    background: #ecf5ff;
    color: #409eff;
    border-color: #b3d8ff;
  }

  .video-container.is-fullscreen & {
    background: rgba(0, 0, 0, 0.7);
    border-color: rgba(255, 255, 255, 0.15);
    color: #fff;
    backdrop-filter: blur(12px);

    &:hover {
      background: rgba(0, 0, 0, 0.85);
      border-color: rgba(255, 255, 255, 0.3);
    }
  }
}

.ptz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  width: 100%;
}

.ptz-placeholder { aspect-ratio: 1; }

.ptz-btn {
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid #e4e7ed;
  border-radius: 6px;
  background: #fff;
  color: #606266;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  padding: 0;

  &:hover { background: #ecf5ff; border-color: #b3d8ff; color: #409eff; }
  &:active { background: #d9ecff; transform: scale(0.95); }
}

.ptz-btn-center {
  background: #ecf5ff !important;
  border-color: #b3d8ff !important;
  color: #409eff !important;
  &:hover { background: #d9ecff !important; }
}

@media (max-width: 768px) {
  .video-container {
    flex-direction: column;
    height: auto;
    padding: 0;
    gap: 12px;
  }
  .control-sidebar { order: 2; }
  .control-panel { width: 100%; max-width: 200px; }
  .video-wrapper {
    order: 1;
    width: 100vw;
    height: calc(100vw / 16 * 9);
    max-height: none;
    max-width: none;
    :deep(.video_container) { border-radius: 0; }
  }
  .fullscreen-btn { width: 36px; height: 36px; top: 12px; right: 12px; svg { width: 14px; height: 14px; } }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}
</style>